Questionable actions

In "Bully for Steve" he's seen drinking beer during school hours and urinating at the basketball court.

In "You Debt Your Life" is hinted at being a pedophile when he shows a fascination for young girls. In the same episode, he began to wish on how he stayed a drug runner which was heard by the whole school.

In "I Am the Walrus" he has a restraining order against him for sexually harassing an art teacher.

In "Home Wrecker" he knocks items out of the students' hands, sexually harasses female employees, takes students for illegal gambling, locks them in a car for hours, and even offers the kids up to be killed.

He finds a bookie who will bet on anything in "The Wrestler" including when a student will get her period and on preschoolers drawing with crayons. When one girl draws out of the lines, Lewis curses her in front of her parents.

In "100 A.D." He claimed he couldn't return to his job because he took a dump on his desk before stripping into a beach thong.

Notes

The American Dad! staff were surprised over how much of a fan favorite the Principal Lewis character became. [1]

He keeps $500 sticking out of his pocket to make the students think he is rich in "Pulling Double Booty".

In "Jenny Fromdabloc," he attempts to sell belt buckles, one containing a bird that closely resembles Tweety looking indignant at a cross over the caption "There Is No God". He notes that Tweety's eyes are red from smoking weed.

Principal Lewis lives alone in a messy house as seen in "I Am the Walrus" and "Hot Water". In addition, in "I Am the Walrus" he mentions that the messy house is the result of what happens when you try to strike some sense into your lady and his daughter Janet Lewis does not appear to live with him. In "The Worst Stan", he is set up to be married by Stan to school superintendent Ellen Riggs.

In "The Worst Stan", Principal Lewis reveals that his family was the inspiration for the television show Diff'rent Strokes including many of the events depicted on the show. His step-father is named Mr. Druffel and he has a brother named William.